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Internal Use Only
http://biz.lgservice.com
System
SVC MANUAL
MODEL: ARUN Series
(1Ø, 208/230V, 60Hz)
CAUTION
Before servicing the unit, read the safety precautions in general SVC manual.
Only for authorized service personnel.

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Table of Contents

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   Summary of Contents for LG Multi V

  • Page 1 Internal Use Only http://biz.lgservice.com System SVC MANUAL MODEL: ARUN Series (1Ø, 208/230V, 60Hz) CAUTION Before servicing the unit, read the safety precautions in general SVC manual. Only for authorized service personnel.
  • Page 2: Table Of Contents

    External Appearance ........................11 Nomenclature ..........................12 Outdoor Units..........................13 PCB Setting and Test Run......................39 Replacement Procedure .........................46 Trouble Shooting Guide .........................50 - 2 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 3: Safety Precautions

    • There is risk of fire or electric shock. • Improper wiring or installation may cause fire or electric shock. - 3 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 LGE are used, fire or explosion may result. R410A R407C - 4 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 • There is risk of fire, electric shock, or product • There is risk of fire, electric shock, explosion, or damage. injury. - 5 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 • To avoid vibration or water leakage. • If the gas leaks and accumulates around the unit, an explosion may result. 90˚ - 6 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 • It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. - 7 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 Also support the outdoor unit at four points so that it cannot slip sideways. - 8 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 • Be careful and avoid personal injury. • There are sharp and moving parts that could cause personal injury. - 9 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 2.2 Outdoor Unit ............13 3. Combination of Outdoor Units ........14 4. Nomenclature..............15 4.1 Indoor Unit .............15 4.2 Outdoor Unit ............15 - 10 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11: Model Names

    Power Supply 1Ø, 208~230V, 60Hz 038GS2 048GS2 Heat Pump ARUN 2. External Appearance Outdoor Units ARUN038GS2 ARUN048GS2 4, 5 HP - 11 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12: Nomenclature

    N: Inverter and H/P V: Inverter and C/O B: Inverter and Heat Recovery System with Outdoor Unit using R410A - 12 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13: Outdoor Units

    Part 2 Outdoor Units - 13 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 ARUN Series Functions ..................15 - 14 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 4.5 Pump Down ........................33 4.6 Pump Out........................35 4.7 Night Silent Operation....................37 4.8 Vacuum Mode ........................38 4.9 Black Box Function ......................39 - 15 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16: Indoor Unit

    Compressor Min. frequency Stop(0Hz) Cooling and heating load Fuzzy Control Inverter linear control as cooling and heating load increasing - 16 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17: Eev Control

    The degree of Subcool = Tsubcool_out - Tevaporation Tsubcool_out : temperatrue at outlet of subcooler(°C/°F) Tevaporation : evaporation temperature equivalent to low pressure(°C/°F) - 17 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18: Outdoor Unit

    I Oil return operation time : 6 min. for running step I Starting condition:every 6 hours operate I Oil return process ends if compressor protection control starts - 18 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 I Oil return operation time : 3 min. for running step I Starting condition:same as cooling mode I Oil return process ends if compressor protection control starts - 19 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20: Defrost

    2) The running time of defrost operation is over 30% of the total heating time 3) If compressor protection control starts by high discharge temperature of compressor etc. - 20 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21: Stopping Operation

    1 hour after stop & outdoor temp. < 27˚C(81˚F) 4way valve After 15 min. Hot gas bypass valve (Before 15 min. : ON) - 21 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22: Protection Control

    Normal control : low pressure ❈ Frequency holding : frequency (or RPM) is not increasing ( can decrease ) - 22 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 > 307 (44.5) : low pressure ❈ Frequency holding : frequency (or RPM) is not increasing ( can decrease ) - 23 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24: Discharge Temperature Control

    - The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch the connecting terminal with hand nor short two wires directly. - 24 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25: Other Control

    Heat pump : Display 2 is default value Cooling only : no display Factory setting(25 is normal) Model type - 25 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Every indoor unit displays its address on wired remote controller and the 7 segment of main PCB is off. - 26 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27: Sensor Checking Function

    2. The error can be displayed even if the sensor is normal according to installation and temperature condition. If error occurs, check the sensor and judge abnormality. - 27 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 In case 5 number of errors occurs, again perform sensor checking after solving errors. 2. IDU in which error occurred operates fan mode. - 28 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29: Refrigerant Auto Charging

    Press the black button SW01V Press the black button for 2 sec. after turning off all of dip S/W. Completed. - 29 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 3. Set the IDU wired remote controller temperature sensing mode as IDU 4. Be careful that IDU should not be thermo off. - 30 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31: Refrigerant Checking Function

    Press the black button on main PCB SW01V Press the black button for 2 sec. after turning off all of dip switch. Completed - 31 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 Charge the refrigerant by using Refrigerant Auto Charging Function. 4. Impossible to Judge(639) IF the system is not in order, check the other problem except refrigerant. - 32 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33: Pump Down

    3. Maximum operation time of pump down function is 30 min. (in case low pressure doesn't go down) 4. Press black+red button during operation to end pump down.(IDU,ODU off) - 33 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 If charging is carried out with service valves closed and unit stopped after pump down, the compressor will be damaged when unit starts to run, and eventually compressor will be broken. - 34 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35: Pump Out

    Make certain that IDU doesn't run with thermo off mode during operation (in case low pressure doesn't go down) 4. Press black+red button during operation to end pump out.(IDU,ODU OFF) - 35 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 To vacuum outdoor unit after pump out and servicing, use charging ports as shown figure below. Charging port Vacuum pump - 36 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37: Night Silent Operation

    2. In case the function is not used, set the DIP switch OFF and reset the power. 3. If ODU RPM changes, cooling capacity may go down. - 37 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38: Vacuum Mode

    ODU V/V OPEN Main EEV, SC EEV OPEN IDU EEV OPEN Caution ODU operation stops during vacuum mode. Compressor can't operate. - 38 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39: Black Box Function

    <Save EEP data> in LGMV I Saving process : Making Data ➠ Save EEP data ➠ Data saving place select ➠ File save - 39 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40: Pcb Setting And Test Run

    Part 3 PCB Setting and Test Run - 40 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41: Test Run

    Check and confirm that there are no error messages in the display of indoor units or remote controls and LED in outdoor units. CAUTION When cutting main power of the Multi V • Always apply main power of the outdoor unit during use of product (cooling season/heating season).
  • Page 42: How To Cope With Test Run Abnormality

    Reference the trouble shooting guide in the service manual. • When CH05/53/11 ERROR occurs, check if auto-addressing has done and communication wiring is ok. - 42 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43: Dip Switch Setting

    3.1 Location of Setting Switch Main PCB SW01B SW02B (DIP SWITCH) (DIP SWITCH) 7 - Segment SW02V Auto addressing - 43 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 121 ➔ 5 ➔ 2 ➔ 25 ➔ 120 CAUTION Product may not properly operate if the relevant DIP switch is not properly setup. - 44 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 Selector cooling mode with cool/heat selector 9 10 11 12 13 14 9 10 11 12 13 14 - 45 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 Vacuum Mode Vacuum Mode pump after service. 9 10 11 12 13 14 9 10 11 12 13 14 - 46 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47: Replacement Procedure

    1. Replacement Procedure for Compressor ........47 2. Replacement Procedure for INV PCB ........48 3. Caution for Assembling Outdoor Panels after Test Run ..49 - 47 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48: Replacement Procedure For Compressor

    Suction pipe Discharge pipe When inserting the sound proof, be sure to insert counter-clockwise. <Figure 3> - 48 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49: Replacement Procedure For Inv Pcb

    Confirm that there is no gap between INV PCB case and control case.(Figure 4.) If any gap is present, it will cause product malfunction. - 49 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50: Caution For Assembling Outdoor Panels After Test Run

    If screws are not assembled, it allows rain come into control box causing defect of unit. - 50 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51: Trouble Shooting Guide

    Part 4 Trouble Shooting Guide - 51 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 2.1 Compressor ..................54 2.2 Fan Motor .....................55 2.3 Electronic Expansion Valve...............56 2.4 Inverter IPM Checking Method ............59 2.5 Self-Diagnosis Function................60 - 52 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53: The Phenomena From Main Component Failure

    • When CH05/53/11 ERROR occurs, check if auto-addressing has done and communication wiring is ok. - 53 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54: Checking Method For Key Components

    (when measuring absolute values). Accurate measuring values cannot be obtained with a general movable tester (For analog and digital mode). - 54 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55: Fan Motor

    3. If problems continue to occur even after counter- measure of No.1 and No.2, it means that both boards has defect. - 55 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56: Electronic Expansion Valve

    Full open EEV noise. open 1350 pulses - If liquid refrigerant is in EEV, the noise is lower. pulse - 56 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 57 When the coil part is removed or assembled, be careful not to bend the pipe of the body. A part - 57 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 58 If estimated temperature is very low in comparison with suction temperature which is displayed at remote controller then the valve is not fully closed - 58 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59: Inverter Ipm Checking Method

    In case that the control box is opend and before checking electrical parts, it should be checked that the LED 01M, 02M turned off(wait 7 minutes after main power OFF), otherwise it may cause electrical shock. - 59 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60: Self-diagnosis Function

    System is turned off by outdoor unit DC Voltage Over Voltage Charging Outdoor Unit Inverter Compressor Outdoor Unit Inverter Compressor Fault OR Drive Over Current Fault - 60 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 Failure of operation mode conver- Pressure unbalance between outdoor units 1 5 1 sion at Outdoor Unit - 61 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 62: Error 01/02/06

    CN-PIPE2 : Pipe outlet temp sensor CN-PIPE1 : Pipe inlet temp sensor Measure the resistance of outlet pipe temp sensor. - 62 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 ❇ The PCB can differ from model to model. Check from the right source. Checking transmission cable connection status - 63 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 & the unit is stopped automatically. float (High position ➠➀ O p e I ) Condensate water - 64 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 Float switch connector Float switch Housing (CN-FLOAT) [***] Standard of drain pipe head height / slope MAX 18inch MAX 28inch - 65 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 (-9V~+9V) then of communication terminal between IDU and ODU transmission from outdoor unit is normal - 66 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 ***** If ODU Dry Contact function is set , different mode operation error may be occurred because the operation mode is fixed. - 67 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 68 - Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control - 68 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB) - 69 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 After ODU main PCB After Auto addressing, Replace indoor unit 485 reset, error code error code disappears? transmission PCB disappears? - 70 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 Check inverter PCB assembly IPM normality. Is inverter PCB assembly ¡ Replace inverter PCB assembly if abnormality found. normal? Recheck power and installation condition - 71 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 72 Measuring resistance between Compressor output terminal joining position each terminal of compressor Measuring insulation resistance between Comp output terminal and chassis - 72 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 Check inverter PCB assembly IPM normality Is inverter PCB assembly ¡ Replace inverter PCB assembly normal? Recheck power and installation condition - 73 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 74 Troubleshooting Guide Compressor output terminal Measuring resistance between each terminal of compressor joining position Measuring input voltage - 74 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 Check inverter PCB assembly IPM normality Is inverter PCB assembly normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 75 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 76 LGMV similar as Replace high pressure sensor at manifold gauge? Check pipe is blocked or not and take measure - 76 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 77 ** Checking short or not at connector of high * Connector location of high pressure switch at PCB pressure switch Main PCB - 77 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 78 Is inverter PCB assembly normal? Replace inverter PCB assembly Recheck power and installation condition Measuring input voltage Inverter PCB assembly power wiring - 78 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 79 Check inverter PCB assembly IPM normality Is inverter PCB assembly normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 79 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 80 Replace PCB assembly if it is short between pins Signal pin Signal pin Signal pin except No.4,5 pins. CAUTION PFCM module No.4,5 pins are internal short state. - 80 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 81 Is inverter PCB assembly normal? Replace inverter PCB assembly Recheck power and installation condition Measuring input voltage Noise filter wiring - 81 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 82 Check inverter PCB assembly IPM normality Is inverter PCB assembly normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 82 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 83 Troubleshooting Guide Measuring resistance between each Compressor output terminal joining position terminal of compressor Measuring input voltage - 83 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 84 Check another components Is there pipe and operation conditions (strainer etc.) clogging? / Take measures Replace strainer - 84 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 85 Replace sensor of high pressure value(Is it high actually)? Check indoor unit EEV Check indoor unit PCB Check in/outdoor installation condition - 85 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 86 (Notice: it is not full ice forming of strainer, in case that there is installation conditions not at inlet portion but at outlet portion) - 86 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 87 Replace inverter PCB assembly Is inverter PCB assembly normal? Recheck power and installation condition Measuring input voltage LGMV Part Inverter PCB assembly - 87 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 88 10°C(50°F) = 362kΩ : 25°C(77°F)= 200kΩ : 50°C(122°F)= 82kΩ : 100°C(212°F)= 18.5kΩ Check the resistance inverter compressor discharge temperature sensor - 88 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 89 After replacement of Replace corresponding outdoor unit main PCB pressure sensor is the system normal? Low pressure sensor High pressure sensor - 89 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 90 : 25°C(77°F)= 10kΩ : 50°C(122°F)= 3.4kΩ Sensor of piping temperature: 10°C(50°F) = 10kΩ : 25°C(77°F)= 5kΩ : 50°C(122°F)= 1.8kΩ - 90 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 91 130% of outdoor unit same as the data of LGMV? unit capacity at LGMV? Adjust the capacity of indoor and outdoor unit - 91 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 92 The method of checking MAIN PCB and inverter compressor PCB (If normal, transmission LED blinks) Transmission connector & LED in MAIN PCB Transmission connector & LED in inverter compressor PCB - 92 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 93 In case that only transmission PCB is replaced above process is not needed - 93 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 94 Inverter EEPROM inserting point EEPROM enlarged picture Right inserting direction of inverter EEPROM ❊ Note : Replace after power off - 94 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 95 Check resistance between No.19 pin and No.20 pin of PCB PFC module Resistance value should be in 7kΩ ±10%. (at 25°C(77°F)). - 95 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 96 Resistance value should be in 7kΩ ±10%. (at 25°C(77°F)). Check PFC Module No.19,20 and IPM Module Pin soldering condition - 96 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 97 • Fan Motor resistance measuring between each phase Check voltage betwen 1pin and 4pin of fan motor Fan motor connector Tester - 97 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 98 Is inverter PCB assembly Check inverter PCB assembly IPM normality normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 98 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 99 Inverter PCB assembly/Wiring power to inverter PCB on Noise filter Inverter PCB assembly power Noise filter power connection connection - 99 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 100 Replace EEPROM with 24C16 Is EEPROM 24C16? Recheck power and installation condition Note : Replace after power off. - 100 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 101 Air temperature sensor: 10°C(50°F) = 20.7kΩ : 25°C(77°F) = 10kΩ : 50°C(122°F)= 3.4kΩ Pipe temperature sensor: 10°C(50°F) = 10kΩ : 25°C(77°F) = 5kΩ : 50°C(122°F)= 1.8kΩ - 101 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 102 If the same error is occurred in mode, is the same error near future replace 4way valve occurred again? Replace 4 way valve - 102 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 103 ** Confirm the 4way valve coil is inserted to the end *** Check the output voltage of terminal socket during heating operation - 103 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 104 SEPTEMBER, 2008 P/NO : MFL42395707...

This manual is also suitable for:

Multi v arun038gs2Multi v arun048gs2

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